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seven-sister
相关语句
  七姊妹
     Based upon a 2×2 contingency table,a series of techniques including χ2 test,association coefficient and Dice index were used to determine the interspecific association in Davidia involurata Community of Mt.Seven-sister.
     在 2× 2联列表基础上 ,应用 χ2检验、联结系数 (Ac)和 Dice系数 (DI)检测七姊妹山珙桐群落的种间联结性。
短句来源
     Studies on the Interspecific Association of Canopy Trees in Davidia involurata Community of Mt.Seven-sister in Western Hubei
     宣恩七姊妹山珙桐群落种间联结分析
短句来源
     Population structure of Davidia involucrate in Mt.Seven-sister Nature Reserve of central China's Hubei Province
     湖北七姊妹山珙桐种群结构研究
短句来源
  “seven-sister”译为未确定词的双语例句
     DOVETREE COMMUNITY OF MT. SEVEN-SISTER IN WESTERN HUBEI & ITS PROTECTIVE STRATEGIES
     鄂西七姊妹山珙桐群落及其保护对策研究(英文)
短句来源
  相似匹配句对
     Groe of SEVEN
     "七人社"的风采——加拿大画廊漫记
短句来源
     Su Seven
     苏七块
短句来源
     ON THE SEVEN-POINT CHAIN
     关于七点链
短句来源
     A Seven-Dollar Dream
     七美元的梦想
短句来源
     Twin sister
     孪生姐妹
短句来源
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  seven-sister
In this paper we present four case studies of adult women from working class backgrounds who attended Hillside College (a pseudonym for one of the "seven-sister" colleges) during the early 1990s.
      


The present paper deals with the major phytocoenological features of the dovetree community of Mt. Seven-sister in western Hubei and its protection strategies, and comes to the following conclusions;1) Ecological conditions of Mt. Seven-sister are good for the growth and development of dovetree and its community.2) The community possesses specified floristic composition and is dominated by the North-temperat(?) (?)l(?)ent and the East-Asian element3) Evergreen and deciduous phanerophytes, especially,...

The present paper deals with the major phytocoenological features of the dovetree community of Mt. Seven-sister in western Hubei and its protection strategies, and comes to the following conclusions;1) Ecological conditions of Mt. Seven-sister are good for the growth and development of dovetree and its community.2) The community possesses specified floristic composition and is dominated by the North-temperat(?) (?)l(?)ent and the East-Asian element3) Evergreen and deciduous phanerophytes, especially, the deciduous, play the most important role in the community, and the community belongs to montane mixed evergreen and deciduous broad-leaved forest in the subtropical zone.4) The community has marked stratification with three layers, i. e. tree layer (10-2Sm in height), shrub layer(0.5-5m in height)and herb layer with 80-95% of the total coverage.5) The stage structure of dovetree population is an increasing type or a stable type and in dynamic equilibrium as surrounding conditions change.6) The pattern of the dovetree population is contagious, and this kind of aggregation is determined by internal factors intrinsic to dovetree and environmental ones.7) The communty is basically stable but the random. smalt changes in plant numbers, in plant size or age, in community biomass, in the abundance of species or even in the flora may merely result in fluctuation, maturation of the stand or the combination of fluctuation and maturation.8) In oder to protect dovctree gene bank, the following measures should be taken:a)prohibiting the felling of dovetree individuals; b) setting up natural reserve;c) planting man-made dovetree community; d) doing scientific research on its biology and ecology and e) reiniorcing education and propaganda.

本文论述了鄂西七姊妹山罕见的珙桐群落的生态学特点及其保护对策。旨在更好地保护和恢复这一物种基因库;并可望在七姊妹山尽早建立以珙桐为保护对象的自然保护区,使其成为国际性的珙桐保护和研究中心。

Based upon a 2×2 contingency table,a series of techniques including χ2 test,association coefficient and Dice index were used to determine the interspecific association in Davidia involurata Community of Mt.Seven-sister.The results were expressed in the forms of semi-matrix and constellation figures,and indicated that the interspecific association was of little significant level,only four pairs of species exhibited significantly positive association.There was a low association degree between most pairs...

Based upon a 2×2 contingency table,a series of techniques including χ2 test,association coefficient and Dice index were used to determine the interspecific association in Davidia involurata Community of Mt.Seven-sister.The results were expressed in the forms of semi-matrix and constellation figures,and indicated that the interspecific association was of little significant level,only four pairs of species exhibited significantly positive association.There was a low association degree between most pairs of species;meanwhile few pairs of species were extremely exclusive to each other.Involurata were extremely positively associated with Lithocarpus henryi,Meliosma cuneifolia,Aralia chinensis and Daphniphyllum macropodum,but extremly negatively associated with Padus wilsonii.Davidia involurata,Phoebe sheareri,Camellia caudata,whose importance values ranked first,were slightly associated with each other,and they occupied their own niches respectively,competing slightly for environmental resources.The fact that C.caudata were extremely positively associated with ten species showed its stable place in community and its important role in maintaining the stable structure of Davidia involurata Community.Henryi perhaps was a keystone species,because it was extremely positively associated with the three plants,whose importance values ranked first.Finally,it was proposed how to apply interspecific association more efficiently.

在 2× 2联列表基础上 ,应用 χ2检验、联结系数 (Ac)和 Dice系数 (DI)检测七姊妹山珙桐群落的种间联结性。结果表明 :珙桐群落中种间联结的显著程度非常低 ,仅有 4种对联结性显著 ,且均为正联结。大多数种对间的关联度很低 ,存在极大排斥性的种对很少。珙桐和灰柯、泡花树、木、交让木表现出极大的正关联性 ;珙桐与绢毛稠李之间存在极大负关联。重要值排在前三位的珙桐、紫楠、尾叶山茶互相之间的关联度较小。尾叶山茶和 10种植物之间存在极大的正关联性 ,这说明了尾叶山茶在群落中的稳定地位及其重要性。灰柯与珙桐、紫楠、尾叶山茶都存在极大的正关联性 ,这暗示着灰柯可能是群落的关键种。最后对种间联结方法的应用提出了一些建议。

 
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